using System;

public class Program

{

    public static void Main()

    {

         int custid, conu;

   double chg, surchg=0, gramt,netamt;

   string connm;

​

           Console.Write("\n\n");

           Console.Write("Calculate Electricity Bill:\n");

           Console.Write("----------------------------");

           Console.Write("\n\n");

​

   Console.Write("Input Customer ID :");

   custid= Convert.ToInt32(Console.ReadLine());

   Console.Write("Input the name of the customer :");

   connm= Console.ReadLine();

   Console.Write("Input the unit consumed by the customer : ");

   conu= Convert.ToInt32(Console.ReadLine());

   if (conu <200 )

    chg = 1.20;

   else if (conu>=200 && conu<400)

        chg = 1.50;

    else if (conu>=400 && conu<600)

            chg = 1.80;

        else

            chg = 2.00;

   gramt = conu*chg;

   if (gramt>300)

    surchg = gramt*15/100.0;

   netamt = gramt+surchg;

   if (netamt  < 100)

    netamt =100;

   Console.Write("\nElectricity Bill\n");

   Console.Write("Customer IDNO                       :{0}\n",custid);

   Console.Write("Customer Name                       :{0}\n",connm);

   Console.Write("unit Consumed                       :{0}\n",conu);

   Console.Write("Amount Charges @Rs. {0}  per unit :{1}\n",chg,gramt);

   Console.Write("Surchage Amount                     :{0}\n",surchg);

   Console.Write("Net Amount Paid By the Customer     :{0}\n",netamt);

    }

}